This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 49 |
| 3 | 218 |
| 4 | 726 |
| 5 | 2014 |
| 6 | 4904 |
| 7 | 10797 |
| 8 | 21917 |
| 9 | 41601 |
| 10 | 74635 |
| 11 | 127636 |
| 12 | 209480 |
| 13 | 331776 |
| 14 | 509386 |
| 15 | 760991 |
| 16 | 1109703 |
| 17 | 1583723 |
| 18 | 2217045 |
| 19 | 3050206 |
| 20 | 4131082 |
| 21 | 5515730 |
| 22 | 7269276 |
| 23 | 9466849 |
| 24 | 12194561 |
| 25 | 15550533 |
| 26 | 19645967 |
| 27 | 24606264 |
| 28 | 30572188 |
| 29 | 37701076 |
| 30 | 46168094 |